Hi,

first of all let me congratulate you guys on this wonderful community. It's been a pleasure reading about multiboxing for a while in an environment where everyone seems to help eachother and discuss in a mature way.

I've been reading about multiboxing for some time but i always seemed to think that it would be to pricy and to technical to get into it.
But after alot of reading and putting some thoughts into i think i'm ready to try it out.

I already have a system with following specs:

WESTERN DIGITAL Caviar SE 320GB (WD3200KS, 7200RPM, SATA II, 16MB)
SAMSUNG 19" 940BW (500:1, 2ms, DVI, Zilver/Zwart)
ASUS EN8800GTS/HTDP/640M (PCI-E, 640MB DDR3, TV-Out, Dual DVI)
CORSAIR TWINX 2048MB (2x1024) 800MHz DDR2 PC2-6400 CL5
INTEL Core 2 Duo E6600 (Socket 775, 2.4GHz, FSB1066, 4MB Cache, Boxed)
ASUS P5B (Socket 775, Intel P965, DDR2, PCI-E, SATA, Gigabit LAN, 7.1 Audio)
WESTERN DIGITAL Caviar 320GB (7200RPM, ATA100, 8MB)
NEC AD-7173A 18x DVD+/-RW 8x DL 5x DVD-RAM + Labelflash (zwart, bulk)

As i'm interested in 5 boxing i'm having some questions.
How many instances of wow could this system handle (perhaps with memory upgrade)?
And what would you guys suggest as a new main system for the other instances?
I was thinking about building some i7 920 system but don't know if its advisable and i'm always in the mood for people's opinions.

Thx for reading and excuse me for any language mistakes since english isn't my native language.